### Abstract

In this paper the improved surface charge model discussed in parts I and II is used to calculate the magnetic field of a combination of materials. This new model assumes a position dependency instead of a constant surface charge. The structure under consideration consists of a magnet (µr = 1.05) and a smaller soft-magnetic material (µr = 700) on top of that. The results show that 4 or 5 iterations are necessary to accurately calculate this structure, which is similar to the number of part II.

Original language | English |
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Title of host publication | Proceedings of the IEEE International Magnetics Conference, (INTERMAG 2014), May 4-8, 2014, Dresden, Germany |

Pages | AA-7-78/79 |

Publication status | Published - 2014 |

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## Cite this

Casteren, van, D. T. E. H., Paulides, J. J. H., & Lomonova, E. A. (2014). 3D semi-analytical surface charge model including relative permeability using polynomial approximation. In

*Proceedings of the IEEE International Magnetics Conference, (INTERMAG 2014), May 4-8, 2014, Dresden, Germany*(pp. AA-7-78/79)